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July 5v 1927' w. w. HAwklNs IGNITION MAGNET@ Filed Feb. 20. 1922 Patented July 5, 192.7.

UNTED STATES P''ENT FFCE.

WILLIAM W. HAWKINS, OF BROOKLYN, NEW YORK, ASSGNOR` TO WEBSTR ELECTRIC COMPANY, OF RACINE, VVISCONSINLA CORPORATION OF WISCONSIN.

IGNITION MAGNETO.

Application filed February 20, 1,922.I4 Serial No. 537.983.

My invention relates to an ignition magneto, and more particularly to an. ignition magneto comprising movable inductors and a stationary coil structure.

Among its objects, my invention contemplatesv First: The provision of an ignition magneto comprising a stationary coilstriicture,H and primary, secondary and tertiary wind# v A, A, B and BB` the inductors A and AA being located atone end of the non-magnetic bodyi12, andthe inductors B and BB at the other end ofthe body 12. Each of said ind'uctors consistsof a' group vof'arcuate softironl laminae disposed edgewise to the axis of the rotor. Said inductoi's'are adapted to lsweep past 'the pole pieces 11 and the hereinafter nientioned-fpole structure shoes 1liv ings which (3Q-Operate with each other in a Whel tlile'wiOtl rotates. "It Will be noted novel manner to produce anextreniely effective high tension ignition current in the secondary.

Second: The provision in combination with the aforesaid core structure, primary,

secondary and tertiary windings, of im?, proved mea-ns co-operating with a permanently magnetic field structure for effecting and reversing the polarization .of said core structure. Y Thirdz The provision of a novelpriinary or low tension circuitlincluding said'prii mary and tertiary windings, breaker mech? anism and, preferably, a'condenser. Fourth: The provision''of an ignition magnetoA comprising improved means for polarizing and reversing'the polarization of a stationary core structure,A i

Other features, objects anrilx advantages of my present invention willa'ppe'arv as*` the following detaileddescription' progresses. r In the accompanying drawings illustrating my invention," Figure 1 is a Schematic View perspeC-" tive of an ignitionmagn'eto embodyingl thef improvements of my invention;v

Figure 2 is a vertical sectional view whic'h':- may be regarded as havii xgl een'ttaken on" the line 2.--2 of Figure l; and

Figure 3 is a circuit diagram'. i f Similar vcharacters of reference indicate corresponding parts throughout the several views.

Referring to the drawings, reference'numerall() indicates a permanent/magnet pro i vided with opposed' pole pieces 11- -11;1 Disposed between the pole piecesis ai'rotor which consists of a nonragnetic body or.' cylinder 12 suitably journaled for rotation around an axis coincident'with the coinmon center of the concave faces of pole pieces 11.

The non-magnetic body or cylinder 12 is provided at each end `with 1diametrically op-j posite recesses which receive the inducto'rs i approximately that the inductois at each end of the rotor areA 'staggered with respect to theinductors at the other end' 'of the rotor: ""5

" Disposed midw'ay betwen'a'nd above the lpole pieces lll-'11,' and"located at'opposite endsE ofthe magneto',f=ar'e"the L-shaped pole structure shoesA 13 and''l, the" horizontal l Disposed fabovlefand*l supported byv the shoes-"13 and -13 ,and preferably clamped theretol inany' su'itableii'nanner, n ot shown, is-a rectangular magnetic-@restructure 14 which consists of a plurality of-*vertically 'dispose'dj' softv iron -lainin'ae{'fsuit'ablyL riveted `to`gether Carried 'by theupper-"liorizontallydisposed fportion' offthe coreis a priinarywinding lhaving' a'secondry vWinding 161i`n inductive relation I thereto." Disposed upon they lowerfhorizntal-portion of the c'ore'struetu're-is atertiaryi winding 17 Wliich preferablyf is' formed of the 'same size wire as'priina'ry'1 5,'fbu`t preferably includes 4'twice-"as'many lturns as said prnnary' lV l* ljil- 2 i Secondar'yfl is groundedat'one end and has its :insulated terminalf'connected with the 'yero'f distributor mecha'nisin'l,` the said` flyer' being adptedl t'o' 'distribute high tensionfi'gnition current to spark plugs 19-19 jii the usual inaiiner "While I have chosen to illust-rate the'jdistributor mechanism 18 diagrammatically; it will, ofcourse,

be understood that the flyer 18 is driven by or 'with -the" ma'gn'eto' rotor andi in timed relationto'the cam ofythe hereinafter men- Slioes 13 land connected with the stationary or insulzited Contact of the interruptor mechanisn'i illustrated at 20. The interrupter mechanism ijr'be' of conventional or 'any suitable Adesign und lneed not lie'descrihed n'detnil, it being understood that the fooil point engl forming part o the interruptor mechanism is driven by, or iu ,timedrelgition to, the magneto rotor. Oneend of tertiary Winding l is grounded along with the corresponding end of the 'priinary '15, the other end of snidtertiary ivindngheing connected with the fixed or insulated Contact -o'f the i he iuterruptermechanism. A condenser 21, which is interposedhetxyeen the-txed interrupter contact und ground, serres to prevent arcing at the contacts, andjnrtherxmore @ae-"Mes with the Primm" @ed :tertiary ngsn the manner preeently fie-beu- Plained.

.Referring no n to Figure 1, it be understood that \v hen the rotor :isjg the po- Sir-'1011. fhexe abonim a .10W reluetanse path magnet. Y When :the romrdisplaced @Prxmately ustrated n 18.0 dgreesivnm the position il.

'aeree the dined-i911' 51h13 419W ithrogh the @restructure and when the grotvr' 1 5 elaed approximately-2() degrees imm the position shown in Figure Hinsucfpxs :B and :LA -again reverse: the-"tluxwthrwgh Y th dnctor is leaving one of the co 1' e s trnfcture Shofs, and it .WIM-he understood :that 8210.11

time Lthe interrnpter--contaots open, the flyer O f distributor 18 me? Que :Q fithe die .rribirtor segments with which ifcperafes New Ylet us resume-thumb@ 2rotor;moving i.n'the direction indited by the A:irroigv i n Figure 1, is Sweepingpastthe- Poitsm shown .in Figure l.' vCurrept Mayes are created in :primary 15 and tertiary 17, but since the rnterrupter contacts iupclosed waves d not at .this ,time :interfiere the primary 1nd termsv windings being Short circuits@ in parallel through-ground.' s ,the inductor leeres, 0r .iS @011.12 '.10 lelieho@ 13', the

intcrrupter contacts open. When this occurs:

ing

the current from tertiary coil L?, :augmented bf.' 'n discharge' from condenser 21, surges through primary and tends to neutralize or overpowerthe current created-.in coil l5 prior to the separationi'oftlie contacts. The `result, is a decided und instantaneous change init-lie magnetic field in which the secondary 1 6 s dispos-edf Consequently- :r high tension current "is induced in the secondary Winding and an extremely effective ignition spark is miusedto pass n t t li e`.sp; irl "plug with which-the distributor flyer hjigels to connected.4 The pi-inlg'ryf and t'er't'gry windings fonction, inthe @manner described, four tiiries dliiing each coxnplete rei- 'hllgtion q thexotor. While' I prefer to provide the tert-img' vn'itl more .turnsthnpi lcl-,zxppiecizrte that geltignofgtheu q ings- .wliih -lrfiifi'de 21 hier@ eigess'pif'encty y ,L-shxped core structure slrqes 'sscrated with .the eflfllds'os'aid c qre strctnife', pereianenteg'hgt; PQle Pieces therefor, and. a ,rotor coxnprismg indnctors ',xdgpt'ed to cooperate with said pole pieces and said core stucture s hoes to polglrize Aand reverse the polarity Qf said core structure,

3. An ignitonmagnetocomprising a stationzrry core strct-ure comprising parallel side portions adapted to constitute coil cores, primary and secondary windings carried by one of said core structure side p0rtions, a tertiary Winding carried by the other of said core structure side portions, an interrupter controlling the circuits respectively of said primary and tertiary windings, shoes associated With the ends of szrid core structure, a permanent magnet, pole l0 pieces therefor, and a. rotor operating between said pole pieces and comprising four segmental inductors, there being two of said inductors at each end of the rotor, the inductors at each end of the rotor being adapted to oo-operzrte with one of said core structure shoes.

In Witness whereof, I hereunto Subscribe my name this 27th day of January7 1922.

WILLIAM W. HAWKINS. 

